Method for controlling nitrogen leaching loss of farmland

A technology for farmland nitrogen and leaching, applied in the field of controlling farmland nitrogen leaching, can solve problems such as polluting crop products, affecting crop quality, destroying the ozone layer, etc., and achieving the effects of improving soil environment, avoiding impacts and reducing pollution

Inactive Publication Date: 2017-05-10
孙新磊
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AI Technical Summary

Problems solved by technology

[0006] The main pollution of chemical fertilizers to agricultural products and the impact on the soil ecological environment are mainly reflected in: (1) causing soil acidification and compaction, destroying soil structure, inhibiting soil microbial activity, causing soil nitrate pollution and soil secondary salinization (2) Pollution of water environment by nitrogen fertilizer application: lead to eutrophication of water body salt, nitrogen leaching pollutes groundwater (3) Effect of nitrogen fertilizer application on atmospheric environment: nitrogen volatilization pollutes the atmosphere, NOx emission forms acid rain, destroys the ozone layer, and leads to the greenhouse effect ( 4) Excessive application of nitrogen fertilizers on the pollution of crop products and the impact on the food chain: polluting crop products, affecting crop quality, and causing "environmental hormones" problems

Method used

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  • Method for controlling nitrogen leaching loss of farmland

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Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0036] A method for controlling farmland nitrogen leaching loss, carried out according to the following steps:

[0037] Step 1: Analyze vetiver to determine root distribution depth and width;

[0038] Step 2: Analyze the soil to determine the nitrogen content;

[0039] Step 3: Determine vetiver as a nitrogen pump plant: According to the root system characteristics of vetiver, combined with nitrogen bioaccumulation

[0040] capacity to identify suitable nitrogen pumping plants;

[0041] The fourth step: planting of vetiver, bind the root of vetiver in the root-binding device, wherein the binding depth of the root-binding device is the same as the main distribution depth of the root system of the plant to be planted, that is, the depth of the cultivation layer 0-30cm The root bundle device in the fourth step comprises a semi-transparent wall, a closed wall, a plant root channel, a handle ring, and a positive cube device formed by an upper opening; the cube height is 30cm, and ...

specific Embodiment 2

[0044] Step 1: Analyze Miscanthus to determine the depth and width of root distribution;

[0045] Step 2: Analyze the soil to determine the nitrogen content;

[0046] The third step: Determine Miscanthus as a nitrogen pump plant: According to the characteristics of the root system of the plant, the plant is determined by the Kjeldahl nitrogen method

[0047] The total nitrogen content in the body and the plant biomass were measured by weighing, and the total nitrogen content was multiplied by the plant biomass per unit area to obtain the plant biomass.

[0048] Nitrogen bioaccumulation capacity:

[0049] Let the plant total nitrogen content be N, unit g / kg, plant biomass be B, unit kg / hm2, nitrogen bioaccumulation capacity be

[0050] C=N*B, the unit is g N / hm2; combined with nitrogen bioaccumulation capacity, determine the appropriate nitrogen pump plant; the root system characteristics of the plant are determined by measuring the root system length and root length density ...

specific Embodiment 3

[0054] Step 1: Analyze the grain amaranth to determine the depth and width of the root distribution;

[0055] Step 2: Analyze the soil to determine the nitrogen content;

[0056]The third step: determine that the grain amaranth is a nitrogen pump plant: according to the characteristics of the root system of the plant, the plant is determined by the Kjeldahl nitrogen method.

[0057] The total nitrogen content in the body and the plant biomass are measured by weighing, and the total nitrogen content is multiplied by the plant biomass per unit area to get

[0058] Nitrogen bioaccumulation capacity of plants:

[0059] Let the plant total nitrogen content be N, unit g / kg, plant biomass be B, unit kg / hm2, nitrogen bioaccumulation capacity be C=N*B, unit be g N / hm2; combined with nitrogen bioaccumulation capacity, determine Suitable nitrogen pumping plants; root characteristics of plants are obtained by measuring plant root length and root length density and determining root archi...

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Abstract

The invention relates to a method for controlling nitrogen leaching loss of farmland, and belongs to the technical field of agricultural environment protection. The characteristic that plant root systems are distributed in different layers is utilized, plants with the deep root systems and the high nitrogen bioaccumulation capacity are selected as nitrogen pumping plants to absorb excessive nitrogen in deep soil, and meanwhile the root systems of the nitrogen pumping plants are bound with a root binding device, so that the condition that the nitrogen pumping plants compete for the nitrogen with plants to be planted in shallow soil is avoided, and then not only is the normal agricultural production process guaranteed, but also the influences of the nitrogen on the soil ecological environment are avoided. According to the method, the soil environment is improved, pollution to the environment is reduced, ecological protection on the farmland and sustainable agriculture development are promoted, and the method is easy to operate and high in benefit and has a wide application prospect.

Description

technical field [0001] The invention relates to a method for controlling farmland nitrogen leaching loss, which belongs to the technical field of agricultural environmental protection. Background technique [0002] With the development of human social economy and science and technology, due to the increase of population pressure, the demand for agricultural products is increasing. [0003] The bigger it is, the greater the investment in agricultural production, especially the use of chemical fertilizers. The contribution of chemical fertilizers to agriculture is well known, and an important feature of modern agriculture is the use of chemical fertilizers. Nitrogen fertilizer is the most widely used fertilizer in the world. According to statistics, in the 50 years from 1949 to 1998, there was a significant correlation between my country's total annual grain output and the annual application of chemical fertilizer nitrogen. Experimental statistics prove that among the three ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00A01G7/06
CPCA01G7/06A01G22/00
Inventor 孙新磊
Owner 孙新磊
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